public class Student extends Person {
    private int sno;
    private String clas;

    public Student() {
    }

    public Student(String name, int age, int sno, String clas) {
        super(name, age);
        this.sno = sno;
        this.clas = clas;
    }

    @Override
    public void run() {
        super.run();
        System.out.println(this.getName()+"在学习");
    }
}
